package com.cgly.medical.config;

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Primary;
import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;

/**
 * @program: medical
 * @description: JSON序列化规则
 * @author: chen di
 * @create: 2022-08-12 16:15
 */
public class JacksonConfig {
    @Bean
    @Primary
    @ConditionalOnMissingBean(ObjectMapper.class)
    public ObjectMapper jacksonObjectMapper(Jackson2ObjectMapperBuilder builder){
        ObjectMapper objectMapper = builder.createXmlMapper(false).build();
        //通过该方法对mapper对象进行设置，所有序列化的对象都将按改规则进行系列化，属性为NULL 不序列化
        objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);
        return objectMapper;
    }
    // Include.Include.ALWAYS    默认
    // Include.NON_DEFAULT     属性为默认值不序列化
    // Include.NON_EMPTY        属性为空（"")或者为NULL都不序列化
    // Include.NON_NULL         属性为NULL不序列化
}